Free · Runs in your browser
Resize images in bulk

A free bulk image resizer to scale whole folders at once

Drop a whole folder and let this bulk image resizer resize images in bulk to the exact size you need. Set a target width and height in pixels, or a percentage scale, lock the aspect ratio, and download every result one by one or as a ZIP. Your pictures never leave your browser — there is no upload and no sign-up.

Drop images here or click to browse

Add as many images as you like — JPG, PNG, WebP, GIF

100% private — your images are processed in your browser and never uploaded.

How to resize images in bulk in three steps

This bulk image resizer turns a folder of mismatched photos into a tidy, uniform set without any software install. The whole flow to resize images in bulk happens on this one page, right inside your browser.

  1. 01

    Add your images

    Drag a whole folder onto the bulk image resizer, or click to browse and pick the files you want to resize. Add as many images as you like — JPG, PNG, WebP, and GIF frames are all welcome, and nothing is uploaded anywhere as you resize images in bulk.

  2. 02

    Set your target size

    Type a target width and height in pixels, or switch to a percentage scale to shrink or grow by a ratio. Keep the aspect ratio locked so nothing stretches, and tick "don't enlarge smaller images" when you only want to scale down. The bulk image resizer applies that one setting to every file, so you resize images in bulk with consistent dimensions instead of editing each photo by hand.

  3. 03

    Download the resized files

    Hit process and the tool will resize images in bulk locally, keeping each file in its source format. Download a single file or grab the whole batch as a ZIP — the resized images are ready to use, and your originals stay untouched on disk.

A bulk image resizer built to make every file the same size

Stop opening one photo at a time. Configure the size once, and resize images in bulk so a messy folder of different dimensions comes out clean, uniform, and ready to ship.

One size, every file

Set the width, height, or percentage once and the bulk image resizer reuses it across the batch. That is the whole point of a bulk image resizer: you resize images in bulk with one decision instead of repeating the same export dozens of times. Lock the aspect ratio so each picture scales cleanly without distortion.

Pixels or percentage

Resize images to an exact pixel width and height, or scale by a percentage when you just want everything smaller or larger. Turn on "don't enlarge smaller images" to leave low-resolution files alone, so when you resize images in bulk you never blow up a small picture past its native size.

Private by design

This bulk image resizer runs entirely in your browser with the Canvas API. Your images are never uploaded to a server, so you can resize images in bulk even when they are private, sensitive, or unreleased. Output keeps the source format, so JPG stays JPG and PNG stays PNG.

Who reaches for a bulk image resizer every week

Anyone juggling a lot of pictures wants to resize images in bulk to one consistent size before they go live, so layouts stay tidy and uploads stay within limits.

Web & store owners

Resize product photos and thumbnails to one shared dimension so grids line up and pages load fast. A bulk image resizer lets you resize images in bulk for a whole catalog the moment new shots come in, with the aspect ratio locked so nothing looks squashed.

Bloggers & marketers

Resize images in bulk to fit a CMS upload limit or a fixed banner width before you publish. One pass through the bulk image resizer and a month of screenshots is scaled to the same size and ready to go.

Developers & designers

Resize images in bulk to generate consistent assets, fit avatars into a grid, or scale exports down by a percentage. Keep the originals, ship the resized copies, and let the bulk image resizer handle the repetitive part.

Bulk image resizer questions

More questions? Email us at support@bulkimagen.com

  • A bulk image resizer is a tool that scales many pictures at once instead of one at a time. You add a folder, set a target width and height or a percentage, and it will resize images in bulk into a uniform set you can download together.

Need to create images too, not just resize them?

When you are done here, BulkImagen can generate fresh images in bulk from a single prompt with credits — the same batch mindset, applied to AI image generation. Resize what you have, then create what you need.